mirror of
https://github.com/LadybirdBrowser/ladybird.git
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2f2b7814d1
This commit implements line wrapping in the terminal, and tries its best to move the cursor to the "correct" position.
430 lines
11 KiB
C++
430 lines
11 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Daniel Bertalan <dani@danielbertalan.dev>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Noncopyable.h>
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#include <AK/NonnullOwnPtrVector.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <Kernel/API/KeyCode.h>
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#include <LibVT/EscapeSequenceParser.h>
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#include <LibVT/Position.h>
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#ifndef KERNEL
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# include <LibVT/Attribute.h>
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# include <LibVT/Line.h>
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#else
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namespace Kernel {
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class VirtualConsole;
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}
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# include <LibVT/Attribute.h>
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#endif
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namespace VT {
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enum CursorStyle {
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None,
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BlinkingBlock,
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SteadyBlock,
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BlinkingUnderline,
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SteadyUnderline,
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BlinkingBar,
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SteadyBar
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};
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class TerminalClient {
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public:
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virtual ~TerminalClient() { }
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virtual void beep() = 0;
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virtual void set_window_title(const StringView&) = 0;
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virtual void set_window_progress(int value, int max) = 0;
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virtual void terminal_did_resize(u16 columns, u16 rows) = 0;
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virtual void terminal_history_changed(int delta) = 0;
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virtual void emit(const u8*, size_t) = 0;
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virtual void set_cursor_style(CursorStyle) = 0;
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};
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class Terminal : public EscapeSequenceExecutor {
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public:
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#ifndef KERNEL
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explicit Terminal(TerminalClient&);
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#else
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explicit Terminal(Kernel::VirtualConsole&);
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#endif
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virtual ~Terminal()
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{
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}
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bool m_need_full_flush { false };
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#ifndef KERNEL
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void invalidate_cursor();
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#else
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virtual void invalidate_cursor() = 0;
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#endif
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void on_input(u8);
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void set_cursor(unsigned row, unsigned column, bool skip_debug = false);
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void clear_including_history()
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{
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clear_history();
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clear();
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}
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#ifndef KERNEL
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void clear();
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void clear_history();
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#else
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virtual void clear() = 0;
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virtual void clear_history() = 0;
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#endif
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#ifndef KERNEL
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void set_size(u16 columns, u16 rows);
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#else
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virtual void set_size(u16 columns, u16 rows) = 0;
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#endif
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u16 columns() const
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{
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return m_columns;
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}
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u16 rows() const { return m_rows; }
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u16 cursor_column() const { return m_current_state.cursor.column; }
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u16 cursor_row() const { return m_current_state.cursor.row; }
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#ifndef KERNEL
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size_t line_count() const
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{
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if (m_use_alternate_screen_buffer)
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return m_alternate_screen_buffer.size();
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else
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return m_history.size() + m_normal_screen_buffer.size();
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}
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Line& line(size_t index)
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{
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if (m_use_alternate_screen_buffer) {
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return m_alternate_screen_buffer[index];
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} else {
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if (index < m_history.size())
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return m_history[(m_history_start + index) % m_history.size()];
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return m_normal_screen_buffer[index - m_history.size()];
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}
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}
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const Line& line(size_t index) const
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{
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return const_cast<Terminal*>(this)->line(index);
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}
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Line& visible_line(size_t index)
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{
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return active_buffer()[index];
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}
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const Line& visible_line(size_t index) const
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{
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return active_buffer()[index];
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}
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size_t max_history_size() const { return m_max_history_lines; }
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void set_max_history_size(size_t value)
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{
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if (value == 0) {
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auto previous_size = m_history.size();
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m_max_history_lines = 0;
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m_history_start = 0;
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m_history.clear();
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m_client.terminal_history_changed(-previous_size);
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return;
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}
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if (m_max_history_lines > value) {
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NonnullOwnPtrVector<Line> new_history;
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new_history.ensure_capacity(value);
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auto existing_line_count = min(m_history.size(), value);
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for (size_t i = m_history.size() - existing_line_count; i < m_history.size(); ++i) {
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auto j = (m_history_start + i) % m_history.size();
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new_history.unchecked_append(move(static_cast<Vector<NonnullOwnPtr<Line>>&>(m_history).at(j)));
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}
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m_history = move(new_history);
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m_history_start = 0;
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m_client.terminal_history_changed(value - existing_line_count);
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}
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m_max_history_lines = value;
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}
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size_t history_size() const { return m_use_alternate_screen_buffer ? 0 : m_history.size(); }
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#endif
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void inject_string(const StringView&);
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void handle_key_press(KeyCode, u32, u8 flags);
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#ifndef KERNEL
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Attribute attribute_at(const Position&) const;
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#endif
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bool needs_bracketed_paste() const
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{
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return m_needs_bracketed_paste;
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};
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bool is_within_scroll_region(u16 line) const
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{
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return line >= m_scroll_region_top && line <= m_scroll_region_bottom;
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}
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protected:
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// ^EscapeSequenceExecutor
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virtual void emit_code_point(u32) override;
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virtual void execute_control_code(u8) override;
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virtual void execute_escape_sequence(Intermediates intermediates, bool ignore, u8 last_byte) override;
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virtual void execute_csi_sequence(Parameters parameters, Intermediates intermediates, bool ignore, u8 last_byte) override;
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virtual void execute_osc_sequence(OscParameters parameters, u8 last_byte) override;
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virtual void dcs_hook(Parameters parameters, Intermediates intermediates, bool ignore, u8 last_byte) override;
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virtual void receive_dcs_char(u8 byte) override;
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virtual void execute_dcs_sequence() override;
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struct BufferState {
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Attribute attribute;
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CursorPosition cursor;
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};
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void carriage_return();
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inline void scroll_up(size_t count = 1);
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inline void scroll_down(size_t count = 1);
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void linefeed();
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#ifndef KERNEL
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void scroll_up(u16 region_top, u16 region_bottom, size_t count);
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void scroll_down(u16 region_top, u16 region_bottom, size_t count);
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void scroll_left(u16 row, u16 column, size_t count);
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void scroll_right(u16 row, u16 column, size_t count);
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void put_character_at(unsigned row, unsigned column, u32 ch);
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void clear_in_line(u16 row, u16 first_column, u16 last_column);
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#else
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virtual void scroll_up(u16 region_top, u16 region_bottom, size_t count) = 0;
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virtual void scroll_down(u16 region_top, u16 region_bottom, size_t count) = 0;
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virtual void scroll_left(u16 row, u16 column, size_t count) = 0;
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virtual void scroll_right(u16 row, u16 column, size_t count) = 0;
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virtual void put_character_at(unsigned row, unsigned column, u32 ch) = 0;
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virtual void clear_in_line(u16 row, u16 first_column, u16 last_column) = 0;
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#endif
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void unimplemented_control_code(u8);
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void unimplemented_escape_sequence(Intermediates, u8 last_byte);
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void unimplemented_csi_sequence(Parameters, Intermediates, u8 last_byte);
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void unimplemented_osc_sequence(OscParameters, u8 last_byte);
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void emit_string(const StringView&);
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void alter_mode(bool should_set, Parameters, Intermediates);
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// CUU – Cursor Up
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void CUU(Parameters);
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// CUD – Cursor Down
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void CUD(Parameters);
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// CUF – Cursor Forward
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void CUF(Parameters);
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// CUB – Cursor Backward
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void CUB(Parameters);
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// CNL - Cursor Next Line
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void CNL(Parameters);
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// CPL - Cursor Previous Line
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void CPL(Parameters);
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// CUP - Cursor Position
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void CUP(Parameters);
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// ED - Erase in Display
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void ED(Parameters);
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// EL - Erase in Line
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void EL(Parameters);
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// SGR – Select Graphic Rendition
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void SGR(Parameters);
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// Save Current Cursor Position
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void SCOSC();
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// Restore Saved Cursor Position
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void SCORC();
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// Save Cursor (and other attributes)
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void DECSC();
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// Restore Cursor (and other attributes)
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void DECRC();
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// DECSTBM – Set Top and Bottom Margins ("Scrolling Region")
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void DECSTBM(Parameters);
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// RM – Reset Mode
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void RM(Parameters, Intermediates);
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// SM – Set Mode
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void SM(Parameters, Intermediates);
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// DA - Device Attributes
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void DA(Parameters);
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// HVP – Horizontal and Vertical Position
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void HVP(Parameters);
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// NEL - Next Line
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void NEL();
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// IND - Index (move down)
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void IND();
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// RI - Reverse Index (move up)
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void RI();
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// DECBI - Back Index
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void DECBI();
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// DECFI - Forward Index
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void DECFI();
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// DSR - Device Status Reports
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void DSR(Parameters);
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// DECSCUSR - Set Cursor Style
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void DECSCUSR(Parameters);
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// ICH - Insert Character
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void ICH(Parameters);
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// SU - Scroll Up (called "Pan Down" in VT510)
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void SU(Parameters);
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// SD - Scroll Down (called "Pan Up" in VT510)
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void SD(Parameters);
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// IL - Insert Line
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void IL(Parameters);
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// DCH - Delete Character
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void DCH(Parameters);
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// DL - Delete Line
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void DL(Parameters);
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// CHA - Cursor Horizontal Absolute
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void CHA(Parameters);
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// REP - Repeat
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void REP(Parameters);
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// VPA - Line Position Absolute
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void VPA(Parameters);
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// VPR - Line Position Relative
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void VPR(Parameters);
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// HPA - Character Position Absolute
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void HPA(Parameters);
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// HPR - Character Position Relative
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void HPR(Parameters);
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// ECH - Erase Character
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void ECH(Parameters);
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// FIXME: Find the right names for these.
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void XTERM_WM(Parameters);
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// DECIC - Insert Column
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void DECIC(Parameters);
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// DECDC - Delete Column
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void DECDC(Parameters);
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#ifndef KERNEL
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TerminalClient& m_client;
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#else
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Kernel::VirtualConsole& m_client;
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#endif
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EscapeSequenceParser m_parser;
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#ifndef KERNEL
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size_t m_history_start = 0;
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NonnullOwnPtrVector<Line> m_history;
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void add_line_to_history(NonnullOwnPtr<Line>&& line)
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{
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if (max_history_size() == 0)
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return;
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if (m_history.size() < max_history_size()) {
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VERIFY(m_history_start == 0);
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m_history.append(move(line));
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return;
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}
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m_history.ptr_at(m_history_start) = move(line);
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m_history_start = (m_history_start + 1) % m_history.size();
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}
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NonnullOwnPtrVector<Line>& active_buffer() { return m_use_alternate_screen_buffer ? m_alternate_screen_buffer : m_normal_screen_buffer; };
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const NonnullOwnPtrVector<Line>& active_buffer() const { return m_use_alternate_screen_buffer ? m_alternate_screen_buffer : m_normal_screen_buffer; };
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NonnullOwnPtrVector<Line> m_normal_screen_buffer;
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NonnullOwnPtrVector<Line> m_alternate_screen_buffer;
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#endif
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bool m_use_alternate_screen_buffer { false };
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size_t m_scroll_region_top { 0 };
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size_t m_scroll_region_bottom { 0 };
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u16 m_columns { 1 };
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u16 m_rows { 1 };
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BufferState m_current_state;
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BufferState m_normal_saved_state;
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BufferState m_alternate_saved_state;
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// Separate from *_saved_state: some escape sequences only save/restore the cursor position,
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// while others impact the text attributes and other state too.
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CursorPosition m_saved_cursor_position;
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bool m_swallow_current { false };
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bool m_stomp { false };
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CursorStyle m_cursor_style { BlinkingBlock };
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CursorStyle m_saved_cursor_style { BlinkingBlock };
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bool m_needs_bracketed_paste { false };
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Attribute m_current_attribute;
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Attribute m_saved_attribute;
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String m_current_window_title;
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Vector<String> m_title_stack;
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#ifndef KERNEL
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u32 m_next_href_id { 0 };
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#endif
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Vector<bool> m_horizontal_tabs;
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u32 m_last_code_point { 0 };
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size_t m_max_history_lines { 1024 };
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Optional<u16> m_column_before_carriage_return;
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bool m_controls_are_logically_generated { false };
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};
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}
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